• DocumentCode
    49692
  • Title

    Tri-band filter using combined E-type resonators

  • Author

    Fan, W.X. ; Li, Z.P. ; Gong, S.X.

  • Author_Institution
    Xidian Univ., Xi´an, China
  • Volume
    49
  • Issue
    3
  • fYear
    2013
  • fDate
    Jan. 31 2013
  • Firstpage
    193
  • Lastpage
    194
  • Abstract
    A compact microstrip tri-band bandpass filter using novel combined E-type resonators (CETRs) is presented. The CETR consists of a quarter-wavelength (λ/4) stepped-impedance resonator (SIR) and a quarter-wavelength (λ/4) unit impedance resonator through a via-hole. These two components are relatively independent. The first and the third passband centre frequencies can be flexibly controlled by tuning the impedance ratio RZ of the SIR, whereas the second passband frequency is fixed. The centre frequency of the second passband can be independently controlled by tuning the lengths of L2. The filter is designed to operate at 1.95, 5.2, and 3.5 GHz. The simulated and measured results show good agreement.
  • Keywords
    band-pass filters; microstrip filters; resonator filters; CETR; combined E-type resonator; compact microstrip filter; frequency 1.95 GHz; frequency 3.5 GHz; frequency 5.2 GHz; impedance ratio; passband centre frequency; quarter-wavelength SIR; quarter-wavelength unit impedance resonator; stepped-impedance resonator; triband bandpass filter;
  • fLanguage
    English
  • Journal_Title
    Electronics Letters
  • Publisher
    iet
  • ISSN
    0013-5194
  • Type

    jour

  • DOI
    10.1049/el.2012.3617
  • Filename
    6457565
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=49692